WEAKENING

weakening

(adjective) moderating by making pain or sorrow weaker

debilitative, enervating, enfeebling, weakening

(adjective) causing debilitation

weakening

(noun) the act of reducing the strength of something

weakening

(noun) becoming weaker

Source: WordNet® 3.1

Verb

weakening

present participle of weaken

Noun

weakening (countable and uncountable, plural weakenings)

An instance or process of loss of strength.

(uncountable, mathematics) A structural principle of mathematical logic that states that the hypotheses of any derived fact may be freely extended with additional assumptions.

Source: Wiktionary

WEAKEN

Weak"en, v. t. [imp. & p. p. Weakened; p. pr. & vb. n. Weakening.]

1. To make weak; to lessen the strength of; to deprive of strength; to debilitate; to enfeeble; to enervate; as, to weaken the body or the mind; to weaken the hands of a magistrate; to weaken the force of an objection or an argument. Their hands shall be weakened from the work, that it be not done. Neh. vi. 9.

2. To reduce in quality, strength, or spirit; as, to weaken tea; to weaken any solution or decoction.

Weak"en, v. i.

Definition: To become weak or weaker; to lose strength, spirit, or determination; to become less positive or resolute; as, the patient weakened; the witness weakened on cross-examination. "His notion weakens, his discernings are lethargied." Shak.

Source: Webster’s Unabridged Dictionary 1913 Edition